Saw-tooth-swaging device



(No Model.)

J. E. EMERSON. SAW TOOTH SWAGING DEVICE.

Patented Dec. 23, 1884.

N l'UERs. Pnum mllnrrnn Erarns Parana @rrrea J AMES E. EMERSON, OF BEAVER FALLS, PENNSYLVANIA.

SAW-*TOOTH- -SWAGING DEVlCE.

SPECIFICATION forming part of Letters Patent No. 309,533, dated December 23, 1884-.

A pplieaiion filed July 16, 1851- (No model.)

To aZZ whom it may concern.-

Be it known that I, J ARIES E. EMERSON, a citizen of the United States, residing at Beaver Falls, in the county of Beaver and State of Pennsylvania, have invented certain new and useful Improvements in Clamps for Swaging Saw-Teeth, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention has for its object the clamping of saw-teeth so that the clamp, when in proper position upon a saw-tooth, will determine the width and shape and also the projection that each tooth shall have from the cen ter of the thickness of the saw-plate when the teeth are swaged to fit the shaping-clamp; and it consists in the construction of the clamp of such form and capacity that the object sought for will. be attained, as will be fully hereinafter described.

In the drawings, Figure 1 represents a top view of the clamp as it is secured to a sawtooth. Fig. 2 represents a horizontal view of onehalf of the clamp, with a section of a saw in broken lines in side-view. Fig. 5 represents the underside of the clamping-jaws, and Fig. 4 represents the top of the clamping-jaws removed from the yoke of the clamp.

A represents the yoke ofthe clamping device, having screw-cut eyes a a at its forward edge, and an opening, A, centrally in its forward edge, to receive within said opening A the clamping-jaws.

B B are thumb-screws, one on each side of yoke A, and their centers upon the same axial line, with pins a at their inner ends, that go into holes in the sides of thejaws.

(J O are clamping-jaws of steel, having that I tools used for that purpose are no longer needportion of their opposite parallel faces, 0 c, filecut, and holes a bored in their outer sides, near to or at the center of their lengths, to admit the pins to to enter a distance therein. The forward or outer ends of the clamping-jaws G are inclined. or beveled outward at 0", and also this bevel is beveled to have the opening at the mouth of the jaws the widest on the lower or under side of the jaws, as seen in Figs. and 4.

I) is a slotted guide-plate, made fast to one jaw by the screw (1, then extending transversely over the top of the jaw to the other,where another screw, d, goes through a slot in' plate D into the opposite jaw of the pair, so that the jaws can be adjusted and secured to the desired distance apart to fit any thickness of saw-plate.

E represents a section of a saw-plate with teeth 0 c, and secured in the clamping device, with one tooth thereof in the position of being swaged by the application of my swage,which is the subject of another application filed simultaneously herewith. By this operation of clamping the saw-plate in my new clamp, as the tooth is swaged therein, the form of the cuttingedge of each tooth is determined, and every tooth will be exactly alike in form and width, as is shown in Fig. l in top view.

It will be observed that by having the mouth of the clamping-jaws inclined or beveled outward, the saw-tooth (when the clamp is fixed by the clam ping-screws B to the saw-plate and the swage has performed its duty that every tooth) fills the space between the beveled jaws, and in order to have the width of the teeth at their cutting-points of exactly the same width, gage-marks c any number) are drawn or out into the top sides of the jaws to coincide, and by these marks the cutting-edges of the teeth are determined asto their width, and by having the lower side of the mouth of the clamping-jaws the widest, in swaging the saw-teeth between the jaws, the lower or under part of the teeth will be the widest, which will give in cutting a kerf a clear way for the narrower top of the teeth to follow, without scratching the wood or friction on the sides of the kerf. By the use of this clamp, which gives a true and exact form to every tooth swaged therein, the use of any kind of tool for truing the teeth to be of the same width is avoided, and such ed and their expenseis saved. Further,when this clamp is used to clamp upon the sides of the saw-teetl1,and myimproved guide hammer swage, or any other swage having the proper form to swage theteeth in this clamp, the teeth will all be formed as shown in Fig. 1, in. which figure the swage isshown in position to be ap plied upon tooth e of the saw, and the swage is designated by the reference-letter X, and it would be impossible to crack or split a tooth while swaging it in this clamp.

Having thus fully described my invention,

what I claim, and desire to secure by Letters ing-jaws 0, having the double-beveled mouth,

Patent, is v in combination with a swage, X, as and for 1. A saW-tooth-swaging clamp composed of the purposes described.

the yoke A,set-screwsB, and adjustable clamp- In testimony whereof Iaffix my signature in 5 ing-jaws 0, having the double-beveled mouth, presence of two witnesses.

in which the form of the swzwed tooth is de- T termined, constructed substantially as and for JAMES EMERSQI\' the purposes described. \Vitnesses:

2. A saw-tooth-swaging clamp composed of M. P. OALLAN,

1o theyoke A, set-screws B, and adjustable cianip- NEWTON CRAWFORD. 

